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US ZIP Code Profile

ZIP Code 33050
Marathon, Florida

ZIP code 33050 is in Marathon, located in Monroe County, Florida, within the Key West metro area. Its 2020 Census population was 10,479. The estimated median adjusted gross income per tax return is $45,775, and about 10% of filers report $200,000 or more.

2020 Population
10,479
Census ZCTA
County
Monroe
FIPS 12087
Median income (est.)
$45,775
IRS SOI 2022
Land Area
9.09 mi²
+ 38.423 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CityMarathon, FL
CountyMonroe County (FIPS 12087)
StateFlorida (FIPS 12)
Metro Area (MSA)Key West, FL Micro Area (28580)
Census Region / DivisionSouth Region · South Atlantic Division
Coordinates24.739326, -81.005486
Land / Water Area9.09 mi² land · 38.423 mi² water

02Income & Economics

Distribution of the 5,660 individual tax returns filed in 33050 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
29.1%
$25K–$50K
25.1%
$50K–$75K
14.5%
$75K–$100K
8.5%
$100K–$200K
13.1%
$200K+
9.7%
The $200,000+ bracket accounts for 61% of 33050's total adjusted gross income, from 10% of returns — a concentration that drives the gap between the median ($45,775) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 33050's IRS income metrics, 2020–2022.

Median income (2021→2022)
$45,775
▲ 5.4%
Filers earning $200K+
9.7%
▲ 1.2 pt
Total filers
5,660
▲ 4.8%
GET /zipc/v2/zipcodes/33050/soi?year=… $38K 2020 $43K 2021 $46K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 33050 ZCTA.

2000
11,486
 
2010
8,922
▼ -22.3%
2020
10,479
▲ +17.5%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 33050. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 33050

Marathon and its immediate neighbors, sorted by distance.

3 mi
GET /zipc/v2/distance

Distance from 33050 to any ZIP

Enter a 5-digit ZIP to calculate the distance.

06USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number115655
City AliasesConch Key, Duck Key, Grassy Key, Marathon, Marathon Shores, Marathon Shrs

07Frequently Asked Questions

What county is ZIP code 33050 in?

ZIP code 33050 is in Monroe County, Florida (county FIPS code 12087).

What city is ZIP code 33050?

The primary USPS city for 33050 is Marathon, FL.

What metro area (MSA) is 33050 in?

33050 is part of the Key West, FL Micro Area (MSA code 28580).

What is the population of ZIP code 33050?

The 2020 Census population of 33050 was 10,479 residents.

What is the median income in ZIP code 33050?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 33050 is about $45,775, with around 10% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.